Ngamjit and her team(probably family & staffs) are working at the same building, you could get prompt response concerning your request. I stayed United Tower Thonglor for a month, and invited family and friends.
Plus, she provided gladly a baby chair, crawling mattress, additional cutlery, and plates. Unlike my previous stays in Bangkok, I did cook at home quite often for babies and parents but there is no problem at all. Everything functions perfectly and she replaced microwave oven when it was out of order.
I strongly recommend this place for long term stay or family vacation.